<!DOCTYPE html>
<html lang="ch">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Calc</title>
</head>
<body>
    <form action="calc/add">
        <h1>计算器</h1>
        数字1：<input type="text" name="num1"><br/>
        数字2：<input type="text" name="num2"><br/>
        <input type="submit" value="计算结果">
</form>
</body>
</html>